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Our 5 year old dualing wall oven lights do not operate. I checked the resistance of all 4 bulbs and all measure 2.1 ohms. When I press the keypad switch, I hear a faint "click" meaning a relay is toggling.

Is there fuse and/or a transformer in the lamp circuit? Is there a way to extract an error code?

I am an electronics engineer so tackling the controller board does not scare me......when I have the time to get to it!